Prior to becoming a mom in 2008, Jamie Lynn was a performer herself, starring in Nickelodeon's All That and Zoey 101. Now, the 22-year-old and Britney collaborated on Chillin' With You, of which the pop princess tweeted: "So SOOO beyond excited to have my baby sis @jamielynnspears on the album. <3 <3 <3 And @Tip!!! My homie."